Stepped stepping cooling device for coal gangue sintered material

Abstract

The invention relates to the technical field of coal gangue treatment, and particularly discloses a step-shaped stepping cooling device for coal gangue sintered materials, which comprises a cooling box, and a step-shaped stepping pushing mechanism is arranged in the cooling box. The stepped stepping type material pushing mechanism comprises a plurality of L-shaped ladder plates and a plurality of guide sliding groove strips which are fixed to the inner wall of the cooling box and act with the L-shaped ladder plates, vertical ventilation holes are formed in the horizontal sections of the L-shaped ladder plates, and strip-shaped openings used for penetrating through the left ends of the horizontal sections of the next L-shaped ladder plates are formed in the lower ends of the vertical sections of the L-shaped ladder plates; a linear opening used for penetrating through the left end of the horizontal section of the leftmost L-shaped ladder plate is formed in the left side face of the cooling box. According to the technical scheme, the power system for achieving stepping pushing of the sintered material is simple in structure and higher in stability, smooth pushing of the coal gangue sintered material in the cooling process can be achieved, the material stacking condition is extremely low, and stable operation of the whole cooling device is effectively guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of gangue processing, and particularly discloses a stepped step-type cooling device for gangue sintering material. Background Art

[0002] Gangue decarbonization and sintering is the primary method for resource utilization. Most existing manufacturers use belt-type decarbonization sintering machines to calcine gangue in large quantities. After the belt sintering machine completes the decarbonization and sintering of the gangue, the material is removed from the grate trolley by a single hammer crusher at the rear of the sintering machine. Even after continuous ventilation cooling, the internal temperature of the removed sintered material remains as high as 400°C, necessitating the use of a cooling device to reduce the temperature.

[0003] The existing method for cooling gangue sintered materials is mainly through grate coolers. Traditional grate coolers mainly use the movable grate plates in the grate bed to make periodic back-and-forth movements relative to the fixed grate plates to push the materials. The number of movable grate plates in the grate bed usually needs to be set to more than ten, and each movable grate plate needs to be equipped with a hydraulic cylinder for pushing, resulting in a complex pushing power system for the entire grate cooler. In addition, the gangue sintered materials release latent heat after being crushed and entering the grate cooler, which increases the viscosity of the material. Due to the slow periodic back-and-forth movement of the movable grate plates, some sintered materials that stick to the surface of the movable grate plates due to the released latent heat cannot move forward smoothly, resulting in the occurrence of material piling. Therefore, in response to the technical problems and shortcomings of using traditional grate coolers to cool down coal gangue sintered materials, this application proposes a newly designed stepped step cooling device for coal gangue sintered materials. This stepped step cooling device for coal gangue sintered materials can effectively solve the technical problems and shortcomings of using grate coolers to cool down coal gangue sintered materials. Summary of the Invention

[0004] The present invention aims to provide a stepped step-type cooling device for gangue sintered materials, so as to solve the shortcomings of the existing grate cooler used to cool the gangue sintered materials, such as the complex pushing power system and the frequent occurrence of material piling due to the release of latent heat after the gangue sintered materials are crushed and sticking to the movable grate plate.

[0005] The present invention is achieved through the following technical solutions:

[0006] A stepped step-type cooling device for gangue sintering material comprises a cooling box, a feeding hopper is provided at the left end of the upper surface of the cooling box, a discharging hopper is provided at the right end of the lower surface of the cooling box, a stepped step-type pushing mechanism is provided in the cooling box, an air supply mechanism is provided in the cooling box below the stepped step-type pushing mechanism, an exhaust mechanism is connected to the top end of the cooling box, and a transmission box is provided at the left end of the cooling box;

[0007] The L-shaped ladder is fixed to the inner wall of the cooling box and has a plurality of guide slide bars fixed to the inner wall of the cooling box and acting on the L-shaped ladder plate. A vertical ventilation hole is provided on the horizontal section of the L-shaped ladder plate, and a strip opening is provided at the lower end of the vertical section of the L-shaped ladder plate for passing through the left end of the horizontal section of the next L-shaped ladder plate, and a straight opening is provided on the left side surface of the cooling box for passing through the left end of the horizontal section of the leftmost L-shaped ladder plate. A rack plate is fixed in the cooling box below the L-shaped ladder plate, and each L-shaped ladder plate is connected to a movable push rod that passes through the rack plate and the left side surface of the cooling box and extends into the transmission box, and the left ends of the plurality of movable push rods extending to the cooling box are all in the same vertical line, and the left end of each movable push rod is provided with an abutment wheel, and a spring is connected between each movable push rod and the rack plate;

[0008] The cooling box is provided with a vertical rotating shaft, the end of which is connected to a rotating power device. A plurality of discs are arranged at intervals on the vertical rotating shaft, and a spiral action block that acts on the corresponding abutment wheel is concentrically fixed on each disc.

[0009] As a further configuration of the above scheme, the trajectory of the spiral action block is composed of a concentrically arranged small arc line, an Archimedean spiral, and a large arc line connected in sequence, and the ends of the large arc lines in multiple spiral action blocks are rotated and offset in sequence by the same angle in the rotation direction, and the two ends of the Archimedean spirals in multiple spiral action blocks are arranged on the same vertical line.

[0010] As a further configuration of the above solution, a lateral ventilation hole is provided at the upper end of the vertical section of each L-shaped ladder plate.

[0011] As a further arrangement of the above scheme, the frame plate is arranged in a stepped shape, and a guide hole is opened on the frame plate and is aligned with the vertical section of each L-shaped ladder plate on the left and right. The movable push rod is connected to the vertical section of the L-shaped ladder plate and is arranged through the corresponding guide hole. Each movable push rod is provided with a protrusion, and the spring is connected between the protrusion and the frame plate.

[0012] As a further configuration of the above solution, each horizontal surface of the frame plate is hollowed out, an ash collecting hopper is provided on the lower surface of the cooling box on the left side of the discharge hopper, and a gate valve is provided at the bottom of the ash collecting hopper.

[0013] As a further arrangement of the above scheme, an online crushing mechanism is provided at the lower end of the feeding hopper, and the online crushing mechanism includes a crushing box connected to the lower end of the feeding hopper, and two crushing rollers are symmetrically arranged in the crushing box, and the ends of the two crushing rollers are connected to crushing motors, and a material guide plate inclined to the lower left is provided at the bottom of the crushing box.

[0014] As a further arrangement of the above scheme, the air supply mechanism includes a blower, the air outlet end of the blower is connected to an air supply main pipe, and the air supply main pipe is connected side by side with air supply branches aligned with each L-shaped ladder plate, and each air supply branch pipe extends to the bottom of the corresponding L-shaped ladder plate, and an upward-facing air outlet hole is opened on the upper surface of the air supply branch pipe.

[0015] As a further arrangement of the above scheme, the exhaust mechanism includes a plurality of exhaust hoods arranged side by side and connected to the top of the cooling box, the upper end of the exhaust hood is connected to an air duct, the ends of the plurality of air ducts are commonly connected to an insulated exhaust duct, and the ends of the insulated exhaust duct are connected to a negative pressure fan.

[0016] In the process of cooling down the gangue sintered material, the cooling device disclosed in the present invention lays a layer of gangue sintered crushed material on the upper surface of the horizontal section of each L-shaped ladder plate. At this time, part of the cold air sent in by the air supply mechanism will pass through the vertical ventilation holes, and then flow upward from the bottom of the gangue sintered material layer, thereby fully taking away the heat in the sintered material. The other part will be blown laterally to the upper surface of the gangue sintered material layer on the next L-shaped ladder plate through the lateral ventilation holes, thereby accelerating the discharge of heat from the sintered material. Combined with the continuous suction action of the exhaust mechanism, the upper end of the inner cavity of the cooling box will accelerate the flow and discharge of the air after heat absorption due to the negative pressure effect, thereby realizing rapid cooling of the gangue sintered material.

[0017] At the same time, the rotary power unit drives all the discs to rotate along with the vertical shaft during the material advancement and conveying process. After rotating to a certain angle, the top contact wheel slips off the end of the large arc on the spiral action block. Then, under the action of the spring tension and restoring force, the top L-shaped ladder plate instantly moves a certain distance to the left. As the L-shaped ladder plate moves left, the layer of coal gangue sinter material on its upper surface is blocked by the left wall of the cooling box and cannot move. As a result, the sinter material originally on the right end of the upper surface of the L-shaped ladder plate smoothly falls to the left end of the upper surface of the next L-shaped ladder plate.

[0018] Then, when the vertical shaft continues to rotate a certain angle, the second abutment wheel will also slip off the end of the large arc line on the spiral action block. Similarly, under the action of the spring tension recovery force, the second L-shaped ladder plate will instantly move a certain distance to the left. At this time, the coal gangue sintered material layer on the upper surface of the second L-shaped ladder plate cannot move due to the obstruction of the vertical section of the first L-shaped ladder plate, so the sintered material on the right end of its upper surface falls to the left end of the upper surface of the third L-shaped ladder plate. This operation is repeated, and the sintered material on the right end of the upper surface of all L-shaped ladder plates is pushed down to the left end of the upper surface of the next L-shaped ladder plate in turn, until the sintered material on the right end of the upper surface of the last L-shaped ladder plate is pushed down to the discharge hopper, thus completing the unloading of the coal gangue after cooling.

[0019] After unloading is completed, all the abutment wheels begin to act with the Archimedean spirals on the corresponding spiral action blocks, thereby squeezing the abutment wheels to overcome the springs, allowing all the L-shaped ladder plates to move to the right the same distance again to achieve reset. In the process of the top L-shaped ladder plate moving to the right to reset, the feeding hopper discharges new coal gangue sintered material to the left end of the top L-shaped ladder plate.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The stepped step-by-step cooling device for gangue sintered material disclosed in the present invention provides a stepped step-by-step pushing mechanism composed of multiple L-shaped ladder plates plugged in end to end in sequence in a cooling box, and combines the joint action of a movable push rod, a spring, an abutment wheel, and a spiral action block. Only a rotary power device is used to drive the vertical rotating shaft to rotate, so that the stepped step-by-step pushing mechanism can gradually push the gangue sintered material laid on its surface to the right. Compared with the traditional grate cooler that uses multiple hydraulic cylinders to independently drive each movable grate plate to move, the technical solution of the present invention realizes the power system for step-by-step pushing of the sintered material without the need for a hydraulic system, and its structure is simple and the stability is higher.

[0022] 2. In the process of pushing the sintered material, the stepped step-by-step pushing mechanism of the present invention first squeezes the abutment wheel through the spiral action block, so that the movable push rod moves and the spring is stretched and accumulated. Then, after the squeezing wheel slips off the spiral action block, the force of the spring is used to make the L-shaped ladder plate move quickly to the left instantly. At the same time, the coal gangue sintered material layer laid on the upper surface of the L-shaped ladder plate will be blocked in the process of moving to the left, so that the coal gangue sintered material on the right end of the upper surface of the L-shaped ladder plate is squeezed and falls, thereby realizing the smooth pushing of the coal gangue sintered material during the cooling process, and the occurrence of material piling is extremely low, which effectively ensures the stable operation of the entire cooling device.

[0023] 3. The structural design of the L-shaped ladder plate in the present invention is that when the sintered material is laid on its upper surface, a part of the cold air sent in by the air supply mechanism will flow vertically from bottom to top through the sintered material layer, thereby fully taking away the heat in the sintered material, and another part of the cold air will be discharged from the lateral ventilation holes at the upper end of the vertical section of the L-shaped ladder plate, thereby blowing sideways on the upper surface of the sintered material layer laid on the next L-shaped ladder plate, thereby accelerating the discharge of heat from the sintered material and effectively improving the cooling rate of the coal gangue. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 This is a schematic diagram of the front three-dimensional structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the back three-dimensional structure of the present invention;

[0027] Figure 3 It is a schematic diagram of the internal three-dimensional structure of the present invention;

[0028] Figure 4 This is a schematic diagram of the three-dimensional structure of the stepped step-by-step pushing mechanism of the present invention from a first angle;

[0029] Figure 5 This is a schematic diagram of the three-dimensional structure from a second angle of the stepped step-by-step pushing mechanism of the present invention;

[0030] Figure 6 This is a schematic diagram of the three-dimensional structure of the L-shaped ladder plate, movable push rod, etc. in the present invention;

[0031] Figure 7 This is a schematic diagram of the three-dimensional structure of the present invention, including the vertical rotating shaft, disc, and spiral action block;

[0032] Figure 8 It is a schematic diagram of the internal three-dimensional structure of the discharge hopper and online crushing mechanism in the present invention. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0034] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. Figures 1 to 8 , and describes the application in detail with reference to embodiments.

[0035] Example 1

[0036] Example 1 discloses a stepped cooling device for gangue sintering material. Figures 1-3 The main body of the cooling system comprises a cooling box 1, a stepped step-type pushing mechanism 2, an air supply mechanism 3, an exhaust mechanism 4, and a transmission box 5. The stepped step-type pushing mechanism 2 is disposed within the cooling box 1, with the air outlet of the air supply mechanism 3 extending into the cooling box 1 below the stepped step-type pushing mechanism 2. The exhaust mechanism 4 is connected to the top of the cooling box 1. The transmission box 5 is disposed on the left side of the cooling box 1. A feeding hopper 6 is disposed at the left end of the upper surface of the cooling box 1, and a discharging hopper 7 is disposed at the right end of the lower surface of the cooling box 1.

[0037] Reference Attachment Figures 4-6 The stepped pusher mechanism 2 includes a plurality of L-shaped ladder plates 201 that are connected end to end in sequence, and guide chute bars 202 that slide horizontally with the front and rear side ends of each L-shaped ladder plate 201 are fixed to the front and rear inner walls of the transmission box 5. Vertical ventilation holes 2011 with a diameter smaller than that of the coal gangue sintered fragments are opened on the horizontal section of the L-shaped ladder plate 201, and lateral ventilation holes 2012 are opened at the upper end of the vertical section of the L-shaped ladder plate 201. Then, a strip-shaped opening 2013 for passing the left end of the horizontal section of the next L-shaped ladder plate 201 is opened at the lower end of the vertical section of the L-shaped ladder plate 201, so that multiple L-shaped ladder plates 201 can be connected end to end in sequence, and the overall shape of a staircase is formed. In addition, a straight opening for passing the left end of the horizontal section of the leftmost L-shaped ladder plate 201 is opened at the upper end of the left side surface of the cooling box 1.

[0038] A stepped frame plate 203 is fixedly attached to the cooling box 1 directly below the multiple L-shaped ladder plates 201. Guide holes 2031 are formed in the frame plate 203, aligned with the vertical sections of each L-shaped ladder plate 201. Connected to the vertical section of each L-shaped ladder plate 201 is a movable push rod 204, which passes through the guide hole 2031 and the left side of the cooling box 1 and extends into the interior of the transmission case 5. The left ends of the multiple movable push rods 204 extending into the cooling box 1 are all aligned vertically. An abutment wheel 205 is also provided at the left end of each movable push rod 204. A bump 206 is provided on the lower surface of the middle section of each movable push rod 204, and a spring 207 is connected between each bump 206 and the side end of the frame plate 203.

[0039] Reference Attachment Figure 3 and attached Figure 7 A vertical shaft 501 is rotatably mounted within the transmission case 5. A rotary power unit 502 is connected to the upper or lower end of the vertical shaft 501. Specifically, the rotary power unit 502 comprises a motor and a reducer. Under the action of the rotary power unit 502, the vertical shaft 501 can rotate within the transmission case 5 at a set speed and direction. Multiple equally spaced discs 503 are fixed to the vertical shaft 501. Each disc 503 is concentrically fixed with a spiral action block 504 that interacts with the abutment wheel 205 at the end of the corresponding movable push rod 204. The trajectory of the spiral action block 504 is formed by a concentrically connected small arc, an Archimedean spiral, and a large arc. The large arc ends of the multiple spiral action blocks 504 are rotated and offset by the same angle in the direction of rotation, and the Archimedean spiral ends of the multiple spiral action blocks 504 are arranged on the same vertical line.

[0040] Reference Attachment Figures 1-3 The air supply mechanism 3 includes a blower 301, and a horizontally arranged air supply main pipe 302 is connected to the air outlet end of the blower 301. Then, air supply branch pipes 303 aligned with each L-shaped ladder plate 201 are connected side by side on the left and right of the air supply main pipe 302. Each air supply branch pipe 303 extends to the bottom of the corresponding L-shaped ladder plate 201, and a row of upward-facing air outlet holes is provided on the upper surface of the air supply branch pipe 303.

[0041] The exhaust mechanism 4 includes a plurality of exhaust hoods 401 arranged side by side and connected to the top of the cooling box 1. An air guide pipe 402 is connected to the upper end of each exhaust hood 401. Then, an insulated exhaust pipe 403 is commonly connected to the ends of the plurality of air guide pipes 402. Finally, a negative pressure fan (not shown) is connected to the end of the insulated exhaust pipe 403. A heat exchanger can also be provided on the insulated exhaust pipe 403 upstream of the negative pressure fan to achieve effective utilization of the thermal energy of the coal gangue sintering furnace.

[0042] During the operation of the cooling device disclosed in this embodiment 1, a layer of gangue sintered material is laid on the upper surface of the horizontal section of each L-shaped ladder plate 201. At this time, part of the cold air sent in by the air supply mechanism 3 will pass through the vertical ventilation holes 2011, and then flow upward from the bottom of the gangue sintered material layer, thereby fully taking away the heat in the sintered material. The other part will be blown laterally to the upper surface of the gangue sintered material layer on the next L-shaped ladder plate 201 through the lateral ventilation holes 2012, thereby accelerating the discharge of heat from the sintered material. Combined with the continuous negative pressure suction effect of the exhaust mechanism 4, rapid cooling of the gangue sintered material can be achieved.

[0043] During the material advancement and transportation process, the rotary power device 502 drives all the discs 503 to rotate along with the vertical rotating shaft 501. After rotating to a certain angle, the uppermost abutting wheel 205 will slip off the end of the large arc line on the spiral action block 504, and then the uppermost L-shaped ladder plate 201 will instantly move a certain distance to the left under the action of the tensile restoring force of the spring 207. In the process of the L-shaped ladder plate 201 moving to the left, the coal gangue sintering material layer on its upper surface cannot move due to the obstruction of the left side wall of the cooling box 1, thereby causing the coal gangue sintering material layer originally on the right end of the upper surface of the L-shaped ladder plate 201 to move to the left. The sintered material falls to the left end of the upper surface of the next L-shaped ladder plate 201; then, when the vertical rotating shaft 501 continues to rotate a certain angle, the second abutting wheel 205 will also slip off the end of the large arc line on the spiral action block 504, and then, under the action of the tensile restoring force of the spring 207, the second L-shaped ladder plate 201 will instantly move a certain distance to the left. At this time, the coal gangue sintered material layer on the upper surface of the second L-shaped ladder plate 201 cannot move due to the obstruction of the vertical section of the first L-shaped ladder plate 201, so that the sintered material on the right end of its upper surface falls to the left end of the upper surface of the third L-shaped ladder plate 201. This operation is repeated, and the sintered material on the right end of the upper surface of all L-shaped ladder plates 201 can be pushed down to the left end of the upper surface of the next L-shaped ladder plate 201 in turn, until the sintered material on the right end of the upper surface of the last L-shaped ladder plate 201 is pushed down to the discharge hopper 7, thereby completing the unloading of the coal gangue after cooling. After unloading is completed, all the abutment wheels 205 begin to act on the Archimedean spirals on the corresponding spiral action blocks 504, thereby squeezing the abutment wheels 205 to overcome the springs 207, and all the L-shaped ladder plates 201 move rightward the same distance again to achieve reset.

[0044] Example 2

[0045] Example 2 discloses a stepped step cooling device for gangue sintering material that is optimized based on the technical solution in Example 1. The similarities between the device and Example 1 are not described again.

[0046] Reference Attachment Figure 1 and attached Figure 8In this embodiment 2, an online crushing mechanism 8 is further provided at the lower end of the feeding hopper 6. The online crushing mechanism 8 includes a crushing box 801 connected to the lower end of the feeding hopper 6. Two crushing rollers 802 are symmetrically arranged in the crushing box 801. A certain roller gap is reserved between the two crushing rollers 802 for the crushed sintered scraps to pass through. Two crushing motors 803 are also installed on the end face of the crushing box 801, and the output shaft of each crushing motor 803 is connected to the corresponding crushing roller 802. In addition, a guide plate 804 is provided at the bottom of the crushing box 801, which is tilted downward to the left, so that the crushed sintered scraps can be guided by the guide plate 804 to the left end of the upper surface of the uppermost L-shaped ladder plate 201. The sintered scraps are then pushed from left to right step by step by the stepped step-by-step pushing mechanism 2. In the process of pushing the material, the heat is fully removed by the cold air, achieving rapid cooling.

[0047] Reference Attachment Figure 3 In this second embodiment, the stepped frame 203 is designed with hollowed-out horizontal surfaces at each stage. Furthermore, multiple ash hoppers 9 are located on the lower surface of the cooling box 1, to the left of the discharge hopper 7. A gate valve (not shown) is installed at the bottom of each hopper to control its opening and closing. This design allows some fine particles in the sintered material after secondary online crushing to pass through the vertical ventilation holes 2011 and fall directly into the ash hopper 9 without being blocked by the frame 203. Operators can periodically open the gate valve at the bottom of the hopper 9 to discharge and clean the ash.

[0048] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A stepped step cooling device for gangue sintering material, comprising a cooling box, a feeding hopper being provided at the left end of the upper surface of the cooling box, and a discharging hopper being provided at the right end of the lower surface of the cooling box, characterized in that: The cooling box is provided with a stepped step-type pushing mechanism, an air supply mechanism is provided in the cooling box below the stepped step-type pushing mechanism, the top of the cooling box is connected to the exhaust mechanism, and a transmission box is provided at the left end of the cooling box; The L-shaped ladder is fixed to the inner wall of the cooling box and has a plurality of guide slide bars fixed to the inner wall of the cooling box and acting on the L-shaped ladder plate. The horizontal section of the L-shaped ladder plate is provided with a vertical ventilation hole, and the lower end of the vertical section of the L-shaped ladder plate is provided with a strip opening for passing the left end of the horizontal section of the next L-shaped ladder plate, and a straight opening for passing the left end of the horizontal section of the leftmost L-shaped ladder plate is provided on the left side of the cooling box. A rack plate is fixed in the cooling box below the L-shaped ladder plate, and each L-shaped ladder plate is connected to a movable push rod that passes through the rack plate and the left side of the cooling box and extends into the transmission box, and the left ends of the plurality of movable push rods extending to the cooling box are all in the same vertical line, and the left end of each movable push rod is provided with an abutment wheel, and a spring is connected between each movable push rod and the rack plate; The cooling box is provided with a vertical rotating shaft, the end of which is connected to a rotating power device. A plurality of discs are arranged at intervals on the vertical rotating shaft, and a spiral action block that acts on the corresponding abutment wheel is concentrically fixed on each disc.

2. The stepped step cooling device for gangue sintering material according to claim 1, characterized in that: The trajectory of the spiral action block is composed of a concentrically arranged small arc line, an Archimedean spiral, and a large arc line connected in sequence. The ends of the large arc lines in multiple spiral action blocks are rotated and offset in sequence at the same angle in the rotation direction, and the two ends of the Archimedean spirals in multiple spiral action blocks are arranged on the same vertical line.

3. The stepped step cooling device for gangue sintering material according to claim 1, characterized in that: The upper end of the vertical section of each L-shaped ladder plate is provided with a lateral ventilation hole.

4. The stepped step cooling device for gangue sintering material according to claim 1, characterized in that: The frame plate is arranged in a stepped shape, and a guide hole is opened on the frame plate and is aligned with the vertical section of each L-shaped ladder plate. The movable push rod is connected to the vertical section of the L-shaped ladder plate and is arranged through the corresponding guide hole. Each movable push rod is provided with a protrusion, and the spring is connected between the protrusion and the frame plate.

5. The stepped step cooling device for gangue sintering material according to claim 4, characterized in that: Each horizontal surface of the frame plate is hollowed out, and an ash collecting hopper is provided on the lower surface of the cooling box on the left side of the discharge hopper, and a gate valve is provided at the bottom of the ash collecting hopper.

6. The stepped step cooling device for gangue sintering material according to claim 5, characterized in that: An online crushing mechanism is provided at the lower end of the feeding hopper, and the online crushing mechanism includes a crushing box connected to the lower end of the feeding hopper, two crushing rollers are symmetrically arranged in the crushing box, and the ends of the two crushing rollers are connected to crushing motors, and a guide plate inclined to the lower left is provided at the bottom of the crushing box.

7. The stepped step cooling device for gangue sintering material according to claim 1, characterized in that: The air supply mechanism includes a blower, the air outlet end of the blower is connected to an air supply main pipe, and the air supply branch pipes aligned with each L-shaped ladder plate are connected side by side to the air supply main pipe, and each air supply branch pipe extends to the bottom of the corresponding L-shaped ladder plate, and an upward-facing air outlet hole is opened on the upper surface of the air supply branch pipe.

8. The stepped step cooling device for gangue sintering material according to claim 1, characterized in that: The exhaust mechanism includes multiple exhaust hoods arranged side by side and connected to the top of the cooling box. The upper end of the exhaust hood is connected to an air guide pipe. The ends of the multiple air guide pipes are commonly connected to an insulation exhaust pipe, and the ends of the insulation exhaust pipe are connected to a negative pressure fan.

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